Method statement for cleaning with hazardous products

A chemical-cleaning method statement must name each product, surface and application method, using the safety data sheet alongside a task-specific COSHH assessment. Skin and eye burns, dermatitis, breathing exposure, slips, environmental harm and dangerous reactions are common risks. COSHH 2002 requires exposure to hazardous substances to be prevented or adequately controlled, with more effective measures preferred over personal protective equipment. Substitute a less hazardous product where possible and specify ventilation, dilution, contact time, labelled containers and secure storage. Never mix products unless the manufacturer explicitly permits it—bleach and acidic cleaners can release toxic chlorine gas. Make spill materials and eyewash available as indicated by the assessment, and train staff on the exact dose and response.

In short

A method statement sets out how a task will be carried out safely, step by step: preparation, set-up, the work itself and completion, with the plant, permits, competence and supervision needed. It puts the controls identified in the risk assessment into a safe system of work.

What it must include

  • ✓Task description, location and duration
  • ✓Step-by-step sequence of works
  • ✓Plant, equipment and materials
  • ✓Permits and isolations required
  • ✓Competence, training and supervision
  • ✓PPE and emergency arrangements
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1

The job

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Tasks on this job

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2

Your details

3

The work

4

Emergency arrangements

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Questions

Is a safety data sheet a COSHH assessment?

No. It supplies hazard information; the assessment must apply that information to the actual use, exposure and people affected.

Can cleaning chemicals be decanted?

Only into suitable, clearly labelled containers under a controlled process; never use food or drink containers.

Why must bleach and acid cleaners be separated?

Mixing them can release toxic chlorine gas, so storage, instructions and supervision must prevent accidental combination.

Sources

Page updated 2026-10-04.

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